CVE-2026-103435

Что произошло

Claude Code validated that a target file path resided within the project working directory at permission-check time, but re-resolved the path at write time without repeating that validation. This time-of-check to time-of-use (TOCTOU) gap allowed an attacker who could write to the workspace to atomically replace a project file with a symlink, causing Claude Code to follow the symlink and write its output to an arbitrary file outside the project sandbox. Exploitation required the ability to win a race condition against the write operation and write access to the shared workspace, enabling a lower-privileged attacker to redirect benign edits to sensitive files (e.g., shell configuration) in a higher-privileged session. Users on standard Claude Code auto-update have received this fix already. Users performing manual updates are advised to update to the latest version. Thank you to hackerone.com/c_h4ck_0 for reporting this issue.

Что делать

dpkg-query -W -f='${Package}	${Version}\n'

rpm -qa --qf '%{NAME}\t%{VERSION}-%{RELEASE}\n'

Get-HotFix | Select-Object HotFixID, InstalledOn

Продукты и затронутые версии

{
  "status": "affected",
  "version": "0",
  "lessThan": "2.1.129",
  "versionType": "semver"
}

CVSS: оценки и векторы

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Источники и ссылки

{
  "cwes": [
    "cve"
  ],
  "epss": {
    "source": "epss",
    "received_at": "2026-11-03T21:11:33.170011+00:00"
  },
  "title": {
    "source": "cve",
    "received_at": "2026-10-28T21:45:06.489871+00:00"
  },
  "scores": [
    "cve"
  ],
  "status": {
    "source": "cve",
    "received_at": "2026-10-28T21:45:06.489871+00:00"
  },
  "affected": [
    "cve"
  ],
  "published": {
    "source": "cve",
    "received_at": "2026-10-28T21:45:06.489871+00:00"
  },
  "solutions": [],
  "percentile": {
    "source": "epss",
    "received_at": "2026-11-03T21:11:33.170011+00:00"
  },
  "references": [
    "cve"
  ],
  "description": {
    "source": "cve",
    "received_at": "2026-10-28T21:45:06.489871+00:00"
  },
  "workarounds": [],
  "configurations": []
}

Хронология записи

1. Данные обновлены04.11.2026, 00:11
2. Данные обновлены03.11.2026, 00:10
3. Данные обновлены02.11.2026, 00:09
4. Данные обновлены31.10.2026, 11:56
5. Данные обновлены30.10.2026, 16:04
6. Данные обновлены29.10.2026, 11:10
7. Опубликована29.10.2026, 00:45

Личная заметка и статус

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